Method

Thinly slice sausage on the diagonal. In large nonstick skillet, fry sausage over medium-high heat until browned, about 3 minutes. Transfer to paper towels to drain. Wipe out skillet.

Butter 1 side of each bread slice. Arrange 4 slices, butter side down, in skillet; top each with arugula, sausage and cheese. Top with remaining bread, buttered side up. Cook over medium heat, pressing and turning once, until golden, crisp and cheese is melted, about 8 minutes.